crypto/perlasm/x86unix.pl

   1 #!/usr/local/bin/perl
   2
   3 package x86unix;        # GAS actually...
   4
   5 $label="L000";
   6 $const="";
   7 $constl=0;
   8
   9 $align=($main'aout)?"4":"16";
  10 $under=($main'aout or $main'coff)?"_":"";
  11 $dot=($main'aout)?"":".";
  12 $com_start="#" if ($main'aout or $main'coff);
  13
  14 sub main'asm_init_output { @out=(); }
  15 sub main'asm_get_output { return(@out); }
  16 sub main'get_labels { return(@labels); }
  17 sub main'external_label { push(@labels,@_); }
  18
  19 if ($main'cpp)
  20         {
  21         $align="ALIGN";
  22         $under="";
  23         $com_start='/*';
  24         $com_end='*/';
  25         }
  26
  27 %lb=(   'eax',  '%al',
  28         'ebx',  '%bl',
  29         'ecx',  '%cl',
  30         'edx',  '%dl',
  31         'ax',   '%al',
  32         'bx',   '%bl',
  33         'cx',   '%cl',
  34         'dx',   '%dl',
  35         );
  36
  37 %hb=(   'eax',  '%ah',
  38         'ebx',  '%bh',
  39         'ecx',  '%ch',
  40         'edx',  '%dh',
  41         'ax',   '%ah',
  42         'bx',   '%bh',
  43         'cx',   '%ch',
  44         'dx',   '%dh',
  45         );
  46
  47 %regs=( 'eax',  '%eax',
  48         'ebx',  '%ebx',
  49         'ecx',  '%ecx',
  50         'edx',  '%edx',
  51         'esi',  '%esi',
  52         'edi',  '%edi',
  53         'ebp',  '%ebp',
  54         'esp',  '%esp',
  55
  56         'mm0',  '%mm0',
  57         'mm1',  '%mm1',
  58         'mm2',  '%mm2',
  59         'mm3',  '%mm3',
  60         'mm4',  '%mm4',
  61         'mm5',  '%mm5',
  62         'mm6',  '%mm6',
  63         'mm7',  '%mm7',
  64
  65         'xmm0', '%xmm0',
  66         'xmm1', '%xmm1',
  67         'xmm2', '%xmm2',
  68         'xmm3', '%xmm3',
  69         'xmm4', '%xmm4',
  70         'xmm5', '%xmm5',
  71         'xmm6', '%xmm6',
  72         'xmm7', '%xmm7',
  73         );
  74
  75 %reg_val=(
  76         'eax',  0x00,
  77         'ebx',  0x03,
  78         'ecx',  0x01,
  79         'edx',  0x02,
  80         'esi',  0x06,
  81         'edi',  0x07,
  82         'ebp',  0x05,
  83         'esp',  0x04,
  84         );
  85
  86 sub main'LB
  87         {
  88         (defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
  89         return($lb{$_[0]});
  90         }
  91
  92 sub main'HB
  93         {
  94         (defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
  95         return($hb{$_[0]});
  96         }
  97
  98 sub main'DWP
  99         {
 100         local($addr,$reg1,$reg2,$idx)=@_;
 101
 102         $ret="";
 103         $addr =~ s/(^|[+ \t])([A-Za-z_]+[A-Za-z0-9_]+)($|[+ \t])/$1$under$2$3/;
 104         $reg1="$regs{$reg1}" if defined($regs{$reg1});
 105         $reg2="$regs{$reg2}" if defined($regs{$reg2});
 106         $ret.=$addr if ($addr ne "") && ($addr ne 0);
 107         if ($reg2 ne "")
 108                 {
 109                 if($idx ne "" && $idx != 0)
 110                     { $ret.="($reg1,$reg2,$idx)"; }
 111                 else
 112                     { $ret.="($reg1,$reg2)"; }
 113                 }
 114         elsif ($reg1 ne "")
 115                 { $ret.="($reg1)" }
 116         return($ret);
 117         }
 118
 119 sub main'QWP
 120         {
 121         return(&main'DWP(@_));
 122         }
 123
 124 sub main'BP
 125         {
 126         return(&main'DWP(@_));
 127         }
 128
 129 sub main'BC
 130         {
 131         return @_;
 132         }
 133
 134 sub main'DWC
 135         {
 136         return @_;
 137         }
 138
 139 #sub main'BP
 140 #       {
 141 #       local($addr,$reg1,$reg2,$idx)=@_;
 142 #
 143 #       $ret="";
 144 #
 145 #       $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
 146 #       $reg1="$regs{$reg1}" if defined($regs{$reg1});
 147 #       $reg2="$regs{$reg2}" if defined($regs{$reg2});
 148 #       $ret.=$addr if ($addr ne "") && ($addr ne 0);
 149 #       if ($reg2 ne "")
 150 #               { $ret.="($reg1,$reg2,$idx)"; }
 151 #       else
 152 #               { $ret.="($reg1)" }
 153 #       return($ret);
 154 #       }
 155
 156 sub main'mov    { &out2("movl",@_); }
 157 sub main'movb   { &out2("movb",@_); }
 158 sub main'and    { &out2("andl",@_); }
 159 sub main'or     { &out2("orl",@_); }
 160 sub main'shl    { &out2("sall",@_); }
 161 sub main'shr    { &out2("shrl",@_); }
 162 sub main'xor    { &out2("xorl",@_); }
 163 sub main'xorb   { &out2("xorb",@_); }
 164 sub main'add    { &out2("addl",@_); }
 165 sub main'adc    { &out2("adcl",@_); }
 166 sub main'sub    { &out2("subl",@_); }
 167 sub main'sbb    { &out2("sbbl",@_); }
 168 sub main'rotl   { &out2("roll",@_); }
 169 sub main'rotr   { &out2("rorl",@_); }
 170 sub main'exch   { &out2("xchg",@_); }
 171 sub main'cmp    { &out2("cmpl",@_); }
 172 sub main'lea    { &out2("leal",@_); }
 173 sub main'mul    { &out1("mull",@_); }
 174 sub main'div    { &out1("divl",@_); }
 175 sub main'jmp    { &out1("jmp",@_); }
 176 sub main'jmp_ptr { &out1p("jmp",@_); }
 177 sub main'je     { &out1("je",@_); }
 178 sub main'jle    { &out1("jle",@_); }
 179 sub main'jne    { &out1("jne",@_); }
 180 sub main'jnz    { &out1("jnz",@_); }
 181 sub main'jz     { &out1("jz",@_); }
 182 sub main'jge    { &out1("jge",@_); }
 183 sub main'jl     { &out1("jl",@_); }
 184 sub main'ja     { &out1("ja",@_); }
 185 sub main'jae    { &out1("jae",@_); }
 186 sub main'jb     { &out1("jb",@_); }
 187 sub main'jbe    { &out1("jbe",@_); }
 188 sub main'jc     { &out1("jc",@_); }
 189 sub main'jnc    { &out1("jnc",@_); }
 190 sub main'jno    { &out1("jno",@_); }
 191 sub main'dec    { &out1("decl",@_); }
 192 sub main'inc    { &out1("incl",@_); }
 193 sub main'push   { &out1("pushl",@_); $stack+=4; }
 194 sub main'pop    { &out1("popl",@_); $stack-=4; }
 195 sub main'pushf  { &out0("pushfl"); $stack+=4; }
 196 sub main'popf   { &out0("popfl"); $stack-=4; }
 197 sub main'not    { &out1("notl",@_); }
 198 sub main'call   {       my $pre=$under;
 199                         foreach $i (%label)
 200                         { if ($label{$i} eq $_[0]) { $pre=''; last; } }
 201                         &out1("call",$pre.$_[0]);
 202                 }
 203 sub main'ret    { &out0("ret"); }
 204 sub main'nop    { &out0("nop"); }
 205 sub main'test   { &out2("testl",@_); }
 206 sub main'bt     { &out2("btl",@_); }
 207 sub main'leave  { &out0("leave"); }
 208 sub main'cpuid  { &out0(".word\t0xa20f"); }
 209 sub main'rdtsc  { &out0(".word\t0x310f"); }
 210 sub main'halt   { &out0("hlt"); }
 211
 212 # SSE2
 213 sub main'emms   { &out0("emms"); }
 214 sub main'movd   { &out2("movd",@_); }
 215 sub main'movq   { &out2("movq",@_); }
 216 sub main'movdqu { &out2("movdqu",@_); }
 217 sub main'movdqa { &out2("movdqa",@_); }
 218 sub main'movdq2q{ &out2("movdq2q",@_); }
 219 sub main'movq2dq{ &out2("movq2dq",@_); }
 220 sub main'paddq  { &out2("paddq",@_); }
 221 sub main'pmuludq{ &out2("pmuludq",@_); }
 222 sub main'psrlq  { &out2("psrlq",@_); }
 223 sub main'psllq  { &out2("psllq",@_); }
 224 sub main'pxor   { &out2("pxor",@_); }
 225 sub main'por    { &out2("por",@_); }
 226 sub main'pand   { &out2("pand",@_); }
 227
 228 # The bswapl instruction is new for the 486. Emulate if i386.
 229 sub main'bswap
 230         {
 231         if ($main'i386)
 232                 {
 233                 &main'comment("bswapl @_");
 234                 &main'exch(main'HB(@_),main'LB(@_));
 235                 &main'rotr(@_,16);
 236                 &main'exch(main'HB(@_),main'LB(@_));
 237                 }
 238         else
 239                 {
 240                 &out1("bswapl",@_);
 241                 }
 242         }
 243
 244 sub out2
 245         {
 246         local($name,$p1,$p2)=@_;
 247         local($l,$ll,$t);
 248         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 249                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 250                                 "shll",0xD1E0,"shrl",0xD1E8,
 251                                 "sarl",0xD1F8);
 252
 253         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 254                 {
 255                 $op=$special{$name}|$reg_val{$p1};
 256                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 257                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 258                 push(@out,$tmp1);
 259                 push(@out,$tmp2);
 260
 261                 $p2=&conv($p2);
 262                 $p1=&conv($p1);
 263                 &main'comment("$name $p2 $p1");
 264                 return;
 265                 }
 266
 267         push(@out,"\t$name\t");
 268         $t=&conv($p2).",";
 269         $l=length($t);
 270         push(@out,$t);
 271         $ll=4-($l+9)/8;
 272         $tmp1=sprintf("\t" x $ll);
 273         push(@out,$tmp1);
 274         push(@out,&conv($p1)."\n");
 275         }
 276
 277 sub out1
 278         {
 279         local($name,$p1)=@_;
 280         local($l,$t);
 281         local(%special)=("bswapl",0x0FC8);
 282
 283         if ((defined($special{$name})) && defined($regs{$p1}))
 284                 {
 285                 $op=$special{$name}|$reg_val{$p1};
 286                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 287                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 288                 push(@out,$tmp1);
 289                 push(@out,$tmp2);
 290
 291                 $p2=&conv($p2);
 292                 $p1=&conv($p1);
 293                 &main'comment("$name $p2 $p1");
 294                 return;
 295                 }
 296
 297         push(@out,"\t$name\t".&conv($p1)."\n");
 298         }
 299
 300 sub out1p
 301         {
 302         local($name,$p1)=@_;
 303         local($l,$t);
 304
 305         push(@out,"\t$name\t*".&conv($p1)."\n");
 306         }
 307
 308 sub out0
 309         {
 310         push(@out,"\t$_[0]\n");
 311         }
 312
 313 sub conv
 314         {
 315         local($p)=@_;
 316
 317 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 318
 319         $p=$regs{$p} if (defined($regs{$p}));
 320
 321         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 322         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 323         return $p;
 324         }
 325
 326 sub main'file
 327         {
 328         local($file)=@_;
 329
 330         local($tmp)=<<"EOF";
 331         .file   "$file.s"
 332 EOF
 333         push(@out,$tmp);
 334         }
 335
 336 sub main'function_begin
 337         {
 338         local($func)=@_;
 339
 340         &main'external_label($func);
 341         $func=$under.$func;
 342
 343         local($tmp)=<<"EOF";
 344 .text
 345 .globl  $func
 346 EOF
 347         push(@out,$tmp);
 348         if ($main'cpp)
 349                 { $tmp=push(@out,"TYPE($func,\@function)\n"); }
 350         elsif ($main'coff)
 351                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 352         elsif ($main'aout and !$main'pic)
 353                 { }
 354         else    { $tmp=push(@out,".type\t$func,\@function\n"); }
 355         push(@out,".align\t$align\n");
 356         push(@out,"$func:\n");
 357         $tmp=<<"EOF";
 358         pushl   %ebp
 359         pushl   %ebx
 360         pushl   %esi
 361         pushl   %edi
 362
 363 EOF
 364         push(@out,$tmp);
 365         $stack=20;
 366         }
 367
 368 sub main'function_begin_B
 369         {
 370         local($func,$extra)=@_;
 371
 372         &main'external_label($func);
 373         $func=$under.$func;
 374
 375         local($tmp)=<<"EOF";
 376 .text
 377 .globl  $func
 378 EOF
 379         push(@out,$tmp);
 380         if ($main'cpp)
 381                 { push(@out,"TYPE($func,\@function)\n"); }
 382         elsif ($main'coff)
 383                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 384         elsif ($main'aout and !$main'pic)
 385                 { }
 386         else    { push(@out,".type      $func,\@function\n"); }
 387         push(@out,".align\t$align\n");
 388         push(@out,"$func:\n");
 389         $stack=4;
 390         }
 391
 392 sub main'function_end
 393         {
 394         local($func)=@_;
 395
 396         $func=$under.$func;
 397
 398         local($tmp)=<<"EOF";
 399         popl    %edi
 400         popl    %esi
 401         popl    %ebx
 402         popl    %ebp
 403         ret
 404 ${dot}L_${func}_end:
 405 EOF
 406         push(@out,$tmp);
 407
 408         if ($main'cpp)
 409                 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
 410         elsif ($main'coff or $main'aout)
 411                 { }
 412         else    { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
 413         push(@out,".ident       \"$func\"\n");
 414         $stack=0;
 415         %label=();
 416         }
 417
 418 sub main'function_end_A
 419         {
 420         local($func)=@_;
 421
 422         local($tmp)=<<"EOF";
 423         popl    %edi
 424         popl    %esi
 425         popl    %ebx
 426         popl    %ebp
 427         ret
 428 EOF
 429         push(@out,$tmp);
 430         }
 431
 432 sub main'function_end_B
 433         {
 434         local($func)=@_;
 435
 436         $func=$under.$func;
 437
 438         push(@out,"${dot}L_${func}_end:\n");
 439         if ($main'cpp)
 440                 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
 441         elsif ($main'coff or $main'aout)
 442                 { }
 443         else    { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
 444         push(@out,".ident       \"$func\"\n");
 445         $stack=0;
 446         %label=();
 447         }
 448
 449 sub main'wparam
 450         {
 451         local($num)=@_;
 452
 453         return(&main'DWP($stack+$num*4,"esp","",0));
 454         }
 455
 456 sub main'stack_push
 457         {
 458         local($num)=@_;
 459         $stack+=$num*4;
 460         &main'sub("esp",$num*4);
 461         }
 462
 463 sub main'stack_pop
 464         {
 465         local($num)=@_;
 466         $stack-=$num*4;
 467         &main'add("esp",$num*4);
 468         }
 469
 470 sub main'swtmp
 471         {
 472         return(&main'DWP($_[0]*4,"esp","",0));
 473         }
 474
 475 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 476 #sub main'wtmp
 477 #       {
 478 #       local($num)=@_;
 479 #
 480 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 481 #       }
 482
 483 sub main'comment
 484         {
 485         if (!defined($com_start) or $main'elf)
 486                 {       # Regarding $main'elf above...
 487                         # GNU and SVR4 as'es use different comment delimiters,
 488                 push(@out,"\n");        # so we just skip ELF comments...
 489                 return;
 490                 }
 491         foreach (@_)
 492                 {
 493                 if (/^\s*$/)
 494                         { push(@out,"\n"); }
 495                 else
 496                         { push(@out,"\t$com_start $_ $com_end\n"); }
 497                 }
 498         }
 499
 500 sub main'label
 501         {
 502         if (!defined($label{$_[0]}))
 503                 {
 504                 $label{$_[0]}="${dot}${label}${_[0]}";
 505                 $label++;
 506                 }
 507         return($label{$_[0]});
 508         }
 509
 510 sub main'set_label
 511         {
 512         if (!defined($label{$_[0]}))
 513                 {
 514                 $label{$_[0]}="${dot}${label}${_[0]}";
 515                 $label++;
 516                 }
 517         if ($_[1]!=0)
 518                 {
 519                 if ($_[1]>1)    { main'align($_[1]);            }
 520                 else            { push(@out,".align $align\n"); }
 521                 }
 522         push(@out,"$label{$_[0]}:\n");
 523         }
 524
 525 sub main'file_end
 526         {
 527         # try to detect if SSE2 or MMX extensions were used on ELF platform...
 528         if ($main'elf && grep {/%[x]*mm[0-7]/i} @out) {
 529                 local($tmp);
 530
 531                 push (@out,"\n.comm\t${under}OPENSSL_ia32cap_P,4,4\n");
 532
 533                 push (@out,".section\t.init\n");
 534                 # One can argue that it's wasteful to craft every
 535                 # SSE/MMX module with this snippet... Well, it's 72
 536                 # bytes long and for the moment we have two modules.
 537                 # Let's argue when we have 7 modules or so...
 538                 #
 539                 # $1<<10 sets a reserved bit to signal that variable
 540                 # was initialized already...
 541                 &main'picmeup("edx","OPENSSL_ia32cap_P");
 542                 $tmp=<<___;
 543                 cmpl    \$0,(%edx)
 544                 jne     1f
 545                 movl    \$1<<10,(%edx)
 546                 pushf
 547                 popl    %eax
 548                 movl    %eax,%ecx
 549                 xorl    \$1<<21,%eax
 550                 pushl   %eax
 551                 popf
 552                 pushf
 553                 popl    %eax
 554                 xorl    %ecx,%eax
 555                 bt      \$21,%eax
 556                 jnc     1f
 557                 pushl   %edi
 558                 pushl   %ebx
 559                 movl    %edx,%edi
 560                 movl    \$1,%eax
 561                 .word   0xa20f
 562                 orl     \$1<<10,%edx
 563                 movl    %edx,0(%edi)
 564                 popl    %ebx
 565                 popl    %edi
 566         .align  4
 567         1:
 568 ___
 569                 push (@out,$tmp);
 570         }
 571
 572         if ($const ne "")
 573                 {
 574                 push(@out,".section .rodata\n");
 575                 push(@out,$const);
 576                 $const="";
 577                 }
 578         }
 579
 580 sub main'data_word
 581         {
 582         push(@out,"\t.long\t".join(',',@_)."\n");
 583         }
 584
 585 sub main'align
 586         {
 587         my $val=$_[0],$p2,$i;
 588         if ($main'aout) {
 589                 for ($p2=0;$val!=0;$val>>=1) { $p2++; }
 590                 $val=$p2-1;
 591                 $val.=",0x90";
 592         }
 593         push(@out,".align\t$val\n");
 594         }
 595
 596 # debug output functions: puts, putx, printf
 597
 598 sub main'puts
 599         {
 600         &pushvars();
 601         &main'push('$Lstring' . ++$constl);
 602         &main'call('puts');
 603         $stack-=4;
 604         &main'add("esp",4);
 605         &popvars();
 606
 607         $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
 608         }
 609
 610 sub main'putx
 611         {
 612         &pushvars();
 613         &main'push($_[0]);
 614         &main'push('$Lstring' . ++$constl);
 615         &main'call('printf');
 616         &main'add("esp",8);
 617         $stack-=8;
 618         &popvars();
 619
 620         $const .= "Lstring$constl:\n\t.string \"\%X\"\n";
 621         }
 622
 623 sub main'printf
 624         {
 625         $ostack = $stack;
 626         &pushvars();
 627         for ($i = @_ - 1; $i >= 0; $i--)
 628                 {
 629                 if ($i == 0) # change this to support %s format strings
 630                         {
 631                         &main'push('$Lstring' . ++$constl);
 632                         $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n";
 633                         }
 634                 else
 635                         {
 636                         if ($_[$i] =~ /([0-9]*)\(%esp\)/)
 637                                 {
 638                                 &main'push(($1 + $stack - $ostack) . '(%esp)');
 639                                 }
 640                         else
 641                                 {
 642                                 &main'push($_[$i]);
 643                                 }
 644                         }
 645                 }
 646         &main'call('printf');
 647         $stack-=4*@_;
 648         &main'add("esp",4*@_);
 649         &popvars();
 650         }
 651
 652 sub pushvars
 653         {
 654         &main'pushf();
 655         &main'push("edx");
 656         &main'push("ecx");
 657         &main'push("eax");
 658         }
 659
 660 sub popvars
 661         {
 662         &main'pop("eax");
 663         &main'pop("ecx");
 664         &main'pop("edx");
 665         &main'popf();
 666         }
 667
 668 sub main'picmeup
 669         {
 670         local($dst,$sym)=@_;
 671         if ($main'cpp)
 672                 {
 673                 local($tmp)=<<___;
 674 #if (defined(ELF) || defined(SOL)) && defined(PIC)
 675         call    1f
 676 1:      popl    $regs{$dst}
 677         addl    \$_GLOBAL_OFFSET_TABLE_+[.-1b],$regs{$dst}
 678         movl    $sym\@GOT($regs{$dst}),$regs{$dst}
 679 #else
 680         leal    $sym,$regs{$dst}
 681 #endif
 682 ___
 683                 push(@out,$tmp);
 684                 }
 685         elsif ($main'pic && ($main'elf || $main'aout))
 686                 {
 687                 &main'call(&main'label("PIC_me_up"));
 688                 &main'set_label("PIC_me_up");
 689                 &main'blindpop($dst);
 690                 &main'add($dst,"\$${under}_GLOBAL_OFFSET_TABLE_+[.-".
 691                                 &main'label("PIC_me_up") . "]");
 692                 &main'mov($dst,&main'DWP($under.$sym."\@GOT",$dst));
 693                 }
 694         else
 695                 {
 696                 &main'lea($dst,&main'DWP($sym));
 697                 }
 698         }
 699
 700 sub main'blindpop { &out1("popl",@_); }
 701
 702 sub main'initseg
 703         {
 704         local($f)=@_;
 705         local($tmp);
 706         if ($main'elf)
 707                 {
 708                 $tmp=<<___;
 709 .section        .init
 710         call    $under$f
 711 ___
 712                 }
 713         elsif ($main'coff)
 714                 {
 715                 $tmp=<<___;     # applies to both Cygwin and Mingw
 716 .section        .ctors
 717 .long   $under$f
 718 ___
 719                 }
 720         elsif ($main'aout)
 721                 {
 722                 local($ctor)="${under}_GLOBAL_\$I\$$f";
 723                 $tmp=".text\n";
 724                 $tmp.=".type    $ctor,\@function\n" if ($main'pic);
 725                 $tmp.=<<___;    # OpenBSD way...
 726 .globl  $ctor
 727 .align  2
 728 $ctor:
 729         jmp     $under$f
 730 ___
 731                 }
 732         push(@out,$tmp) if ($tmp);
 733         }
 734
 735 1;